Title:
COMBINATION ELECTRONIC AND AIR-COLUMN ACTUATED STETHOSCOPE
United States Patent 3539724
Inventors:
Keesee, Daniel C.
Publication Date:
11/10/1970
Export Citation:
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Assignee:
Daniel, Keesee C.
Primary Class:
381/67
Other Classes:
381/98, 381/109
International Classes:
A61B7/02; H03F3/183; A61B7/00; H03F3/181; (IPC1-7): H04R23/00
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US Patent References:
3385930Electronic sound detector
3247324Acoustic and electronic stethoscope
3182129N/A
1686138N/A




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